Water cooler



' Patented July 3o, 1935 UNITED STATES PATENT OFFICE WATER COOLER Edward T. Williams, Pelham Manor, N. Y.

Application December 5, 1931, Serial No. 579,197

3 Claims. (Cl. (i2-141) This invention relates to Water coolers and more particularly to a Water cooler having mechanical means for reducing the temperature of Water iiowing from. a city pressure supply line 5 into the machine from which it is dispensed through a bubbler or other dispensing medium. One important object of the invention is to utilize the cold Waste water for cooling the incoming water, and also for cooling the low pressure gas returned to the compressor.

Fig. l is a diagrammatic View illustrating one application of the invention;

Fig. 2, a fragmentary side .elevation illustrating a different method of applying the Waste Water cooling coil around the motor dome;

denser I2, liquefied, and the liquid transferred through a capillary tube 22, or equivalent pressure reducing means, into the evaporating chamber 23 where it is vaporized, absorbing heat from theliquid contained Within the inner shallow wall of )such evaporating chamber. The vapor is then withdrawn bythe compressor through suction line 24 to the interior of the dome or casing II. This gas is of low pressure and of relatively `high. temperature, such temperature being increased by the absorption of heat from the motor compressing unit under the dome, the

gasl becoming superheated, thus decreasing the efficiency of the unit.

Water to be cooled is supplied from a supply line through pipe I4 to the interior of the cooling chamber I3 within the confines of the evaporator 23, and is discharged therefrom through pipe I5 and bubbler IB, the discharge being controlled by push button control valve I1.

In order to insure-Water withdrawn from the cooling chamber being thoroughly chilled a shell 25 is disposed within the cooling chamber and ,/f such shell forms with the inner wall of the evap' orator a shallow chamber, communication between the interior and exterior of the shell'or the shallow chamber and the interior of the shell Fig. 3, a top plan view of a different applica-y being established by means of a opening 26 near the top of the shell 25.

The inlet pipe I4 admits water to the interior of the shell 25, and the discharge pipe I5 removes water from the exterior of the shell or from the 5 shallow chamber. With this construction, Water coming in through the pipe I4 will be required to pass through the opening 26 and .around to the discharge pipe I5 before it can pass out, thereby coming into good heat exchange relation with the evaporator.

Waste water from the bubbler I6 is collected in a drip basin I8. This cold Waste water is discharged through a pipe I9 which forms with a chamber 2B disposed about the same and being interposed in the Water inlet pipe I4, a heat exchanger by means of which heat from the incoming water is transferred to the waste Water discharged through the pipe I9.

In order to reduce the temperature of the low. 20 pressure gas in the motor compressor dome, the pipe I9 is associated with such dome in a manner to form a second heat exchanger in order to transfer heat from such low pressure gas to the Waste Water. The manner of eiecting this heat transfer from the low pressure gas to the waste water flowing through the pipe I9 is accomplished in either of the Ways shown in Figs. 1, 2, 3, or 4, the illustration in Fig. 4 being prefeerable for the type. of motor compressor unit shown. In Fig. 1 this result is accomplished by coiling the Waste water pipe I9 aroundl the motor compressor unit in the upper portion of the dome. In Fig. -2 the Waste Water coil I9 is around the exterior ofthe casing or dome in a manner to provide good thermal contact between the coil and the interior of the dome. In Fig. 3 is shownthe simplest form for effecting the desiredy heat exchange relation. In this embodiment the waste water pipe I9 is coiled first upon the top of the dome, and since it is on the exterior of the dome it is 'preferably brazed or otherwise intimately secured to the dome.

The embodiment of Fig. 4 is similar to that of Fig. 3 except the waste water pipe I9 is coiled around the interior of the top of the casing or dome. It is unnecessary in this embodiment to join the coil intimately with the domelas the coils are directly exposed -to the low pressure' gas Within the dome.

It will be obvious to those skilled in the art .that various other changes may be made in the construction and arrangement Without departing from the spirit of the invertion and therefore the invention is not limited to what is shown in A:sis

the drawings and described in the specification but only as indicated in the appended claims.

I claim: i

1. In a Water cooler utilizing a refrigerating system of the compressor-ccndenser-evaporator type driven by an electric motor and having a casing around the motor and compressor connected in the low pressure side of the system, a cooling coil within said casing, and means for circulating waste cooled Water through said coil.

2. In a water cooler utilizing a refrigerating system of the compressor-condenser-evaporator type driven by an electric motor and having a casing around the motor and compressorconnected in the low pressure side of the system, a

relation with the incoming water to be lcooled I and then through said cooling coil.

3. In a water cooler utilizing a refrigerating system of the compressor condenser evaporator type driven by an electric motor and having a casing enclosing and forming a low pressure gas chamber around the motor, a pipe coiled around the top of the casing, and means for circulating waste cooled water in heat exchange relation w'ith incoming water to be cooled and then through said coil of pipe to reduce the temperature of the low pressure gas Within said casing. EDWARD T. WILLIAMS. 

